#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
    int t;
    ll b,r=0,i=0;
    string s;
    cin>>t;
    while(t--)
    {
        cin>>s>>b;
        for(int i=0; i<s.size(); i++)
        {
            if(s[i]=='-')
                continue;
            r=((r*10)+(s[i]-'0'))%b;
        }
        if(r)
            printf("Case %lld: not divisible\n",++i);
        else
            printf("Case %lld: divisible\n",++i);
    }
    return 0;
}